DE10162608B4 - Thermostatic valve top - Google Patents

Thermostatic valve top Download PDF

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Publication number
DE10162608B4
DE10162608B4 DE2001162608 DE10162608A DE10162608B4 DE 10162608 B4 DE10162608 B4 DE 10162608B4 DE 2001162608 DE2001162608 DE 2001162608 DE 10162608 A DE10162608 A DE 10162608A DE 10162608 B4 DE10162608 B4 DE 10162608B4
Authority
DE
Germany
Prior art keywords
thermostatic
valve
shape
change
pressure chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE2001162608
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German (de)
Other versions
DE10162608A1 (en
Inventor
Bjarne Frederiksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to DE2001162608 priority Critical patent/DE10162608B4/en
Publication of DE10162608A1 publication Critical patent/DE10162608A1/en
Application granted granted Critical
Publication of DE10162608B4 publication Critical patent/DE10162608B4/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/01Control of temperature without auxiliary power
    • G05D23/12Control of temperature without auxiliary power with sensing element responsive to pressure or volume changes in a confined fluid

Abstract

Thermostatic valve top with a thermostatic element having a pressure space in the inner volume changing Are arranged means, and with an actuating element, which with a Dehnzone the thermostatic element is in operative connection, wherein outer shape-changing Means are provided which from the outside the shape of the pressure chamber outside change the expansion zone, characterized in that the shape-changing Means is an extension (24) of an actuating handle (5), the in a capsule (22) protrudes, in which the thermostatic element (7) is arranged is.

Description

  • The The invention relates to a thermostatic valve top with a thermostatic element, which has a pressure chamber, in the inner volume-changing Are arranged means, and with an actuating element, which with a Dehnzone the thermostatic element is in operative connection, wherein outer shape-changing Means are provided which from the outside the shape of the pressure chamber outside change the expansion zone.
  • In DE 19 46 555 U such a thermostatic element is shown, which defines a pressure chamber whose volume varies depending on the temperature. An actuator is provided which is in operative connection with a stretching zone of the thermostatic element. A cap is screwed onto a frame. By rotating the cap relative to the frame, the distance between the frame and a front side of the cap can be changed countries, so that the cap more or less compresses the thermostatic element and thus forms external shape-changing means.
  • In DE 298 05 921 U1 a regulating valve for hot water circulation systems is described in which from time to time the water is to be brought to an elevated temperature of more than 70 ° C to effect a sterilization. A thermostatic element acts on a plunger, at the lower end of a valve element is attached. The thermostatic element has an upwardly directed piston, which bears against an adjusting screw, which is axially adjustable in a set screw. The adjusting screw is in turn adjustably mounted in an upper portion of a valve bonnet and can be adjusted by means of an adjusting cap. The adjustment cap is used to set the desired circulation temperature.
  • The most radiators in residential and office buildings provided with such thermostatic valve heads. The real thing radiator valve is in the opening direction biased so that a valve pin on the actuator the thermostatic valve top is applied. At a low temperature the pressure chamber in the thermostatic element has its smallest volume, so that Actuator under the action of the valve pin very far into the thermostatic element pushed can be. The valve is fully open. When the temperature rises, then the filling expands of the thermostatic element, for example a gas or a liquid, optionally also a wax filling, so that the volume of the pressure chamber magnification ßert. The actuator is thereby advanced further in the direction of the radiator valve and includes while the radiator valve stronger.
  • Around is to change the setpoint of the thermostatic valve top is it is known to relocate the thermostatic element, either towards the radiator valve to set a lower temperature setpoint, or from the radiator valve away to a higher one Set temperature setpoint. This shift is usually done with Help of a twist grip over a screw thread on a housing is attached. The thermostatic element can then directly in the rotary handle be attached. But it is also possible that the thermostatic element in an auxiliary device is arranged, which displaces from the rotary handle becomes.
  • The Displacement of the thermostatic element sets a certain size of the thermostatic valve top ahead. The thermostatic valve top must be large enough to cover all positions of the thermostatic element can record.
  • you would like to However, the size of a thermostatic valve top preferably Keep small, so that the thermostatic valve attachment is not too far in the space protrudes. this could the risk of damage entail. In addition, usually results in a more pleasing optical Design, when the thermostatic valve top are kept small can.
  • Of the Invention is based on the object, the size of the thermostatic valve top to keep small.
  • These Task is in a thermostatic valve top of the aforementioned Sort of solved by that this shape-changing Means an extension of an operating handle is, which projects into a capsule in which the thermostatic element arranged is.
  • With this configuration, it is no longer necessary to shift the thermostatic element as a whole. If you want to achieve a change in the setpoint, then the shape of the pressure chamber is changed, ie the thermostat element is reduced from the outside to further push the actuator out of the thermostatic element, or it is increased, so that the actuator can penetrate further into the thermostatic element. This outer volume change can be effected by an extension of an operating handle, which projects into the capsule, in which the thermostatic element is arranged, so that the outer shape of the thermostatic element changes. The thermostatic element can therefore be completely or partially compressed or expanded. These shape-changing means usually require we niger space as a means that you need to relocate the thermostatic element altogether. When the operating handle with an extension projects into the capsule in which the thermostatic element is arranged, this is a relatively simple way to compress or expand the thermostatic element.
  • Preferably The thermostatic element has an outer peripheral wall which is variable in length is trained. As a result, a change in length of the thermostatic element altogether possible. The Thermostat element can be upset al so causing that this actuator continues to be pushed out of the thermostatic element. The thermostatic element but can also be stretched, which causes the actuator further into the Thermostat element can be pushed.
  • in this connection It is particularly preferred that the outer peripheral wall has a corrugation. A corrugation, ie a bellows-shaped wall, is a particularly simple embodiment, the length of the peripheral wall variable close. The length changes are small. The corrugation is therefore only weakly stressed on bending. A corrugation on the outer peripheral wall of the thermostatic element has about it addition, the advantage that thereby the surface of the thermostatic element increases, the has contact with the environment. This creates a heat transfer between the thermostatic element and the environment further improved.
  • in this connection it is particularly preferred that the corrugation on the outer peripheral wall a smaller number of waves than a corrugation in one by an invagination formed Dehnzone in which the actuator is inserted. This is the consideration a role that the actuating of the actuating element is much larger as the required length change of the thermostatic element. Because the changes the length of the thermostatic element are small, few waves are sufficient. But also the number of waves in the stretch zone can be made smaller be possible than was previously possible in the prior art. The expansion zone is used only for operation of the actuating element. A safety or protection function at too high a temperature can be ensured by the corrugation of the peripheral wall.
  • Preferably the extension has a screw thread, with the help of Twisting two parts one for the thermostatic element more available Room changeable is. The power transmission then takes place directly between the screw thread and the thermostatic element. There is no danger of transmission elements in an invalid So deform a way that one exact specification of the setpoint is no longer guaranteed. For example can two end faces of the room can be approximated or they can be separated from each other be removed. As they approach each other, the thermostatic element becomes compressed so that - one at constant temperature assuming constant volume of the pressure chamber - the actuator continues to be pushed out of the thermostatic element. With an extension of the room, the thermostatic element can extend, so that the volume is held constant by the fact that the actuator further displaced into the thermostatic element.
  • Preferably the thermostatic element has an anti-rotation lock. This can be by turning the rotary handle or the operating handle, the setpoint change bring, without you fear that must be Rotates thermostatic element.
  • preferably, the thermostatic element is supported by a pressure spring. This embodiment has the advantage that one the shape change the thermostat element also for an overpressure protection can exploit. An overpressure protection is necessary if the radiator valve under the action of the actuator already Completely is closed, by external influences, such as For example, a strong sunlight or a larger number of people in the room, a higher one Temperature arises. In this case increases due to the higher temperature the pressure in the pressure chamber so strong that the risk of damage to the Thermostat element or other parts. The actuator can not dodge further because it is closed by the radiator valve is prevented from further movement. In this case it can become but change the thermostatic element itself by the shape changeability, for example can it change its length and Although against the force of the pressure spring. This change in length is relatively small because the change in length over a size Cross sectional area acts. The volume thus results from the stroke of the change in length and the cross-sectional area of the pressure chamber.
  • Assuming a constant temperature, the change in the shape of the pressure space causes the volume ratios or divisions within the pressure space to change. This change can basically only be done by further pushing the actuating element out of the thermostatic element or, in the opposite case, pushing it further into the thermostatic element. This results in a different starting position for the actuator, in other words, a change in the target value. You can change the shape by a short stroke, which acts over a large cross-sectional area. This can be achieved even with short strokes large volume displacements. The movement of the actuating element can thus be achieved by relatively small strokes. It is also possible to change the length of the thermostatic element. This is a relatively simple measure to change the shape of the pressure chamber from the outside so that the corresponding effects occur on the actuator.
  • The Invention will be described below with reference to preferred embodiments described in more detail in connection with the drawing. Herein show:
  • 1 a schematic cross section through an embodiment of a radiator thermostatic valve top and
  • 2 a schematic representation for explaining the mode of action.
  • A thermostatic valve top 1 serves to actuate a radiator valve shown only schematically by dashed lines 2 and thus to influence an ambient temperature, that of the through the radiator valve 2 controlled radiator is heated. The radiator valve 2 has an actuating pin 3 on, which is biased in the opening direction, ie from the radiator valve 2 is pushed out.
  • The thermostatic valve top has a housing 4 on which a twist grip 5 is rotatable.
  • Inside the rotary handle 5 is a thermostatic element 7 arranged, which has a pressure room 8th having. In the pressure room 8th a liquid or gas filling is arranged, wherein the filling has a strongly temperature-dependent volume, ie at a lower temperature, the volume of the filling in the pressure chamber 8th smaller than at a higher temperature.
  • In a conventional manner, the thermostatic element 7 an invagination 9 on top of a bellows-shaped wall 10 , which is also called "inner wall", is surrounded. The bellows-shaped wall 10 has a corrugation with a variety of waves 11 on. In the invagination 9 is an actuator 12 used, which is an operating end 13 in turn, with the actuating pin 3 interacts. In other words, the actuating pin presses 3 the actuator 12 as far as it goes, in the thermostatic element 7 into it. At a temperature increase in the pressure chamber 8th , which leads to a change in volume of the filling therein, then the actuator 12 further out of the thermostatic element 7 be pushed out. This in turn causes the actuating pin 3 continue into the radiator valve 2 is pressed in and thus to a greater throttling of the radiator valve 2 leads.
  • The thermostatic element 7 has a bottom plate 14 and a face plate 15 on. The bottom plate 14 and the face plate 15 are through a peripheral wall 16 connected, which also has a curl 17 with a predetermined number of waves 18 having. This is the peripheral wall 16 variable in length. If the length of the peripheral wall 16 changed, then the shape of the thermostatic element changes 7 ,
  • The peripheral wall 16 is with her lower end 19 deformed radially outwards. The thermostatic element 7 can with the help of a rotation 21 opposite the housing 4 be secured against rotation.
  • With the change of the position of the front plate 15 while maintaining the position of the bottom plate 14 is a change in the shape of the thermostatic element 7 connected. If the face plate 15 closer to the bottom plate 14 is approximated, then must be at constant volume in the pressure chamber 8th the actuator 12 further out of the thermostatic element 7 be driven out. Here one makes use of a certain gear ratio to advantage: the face plate 15 acts on a stroke over a partial cross section of the thermostatic element 7 , In order to bring about a corresponding volume compensation, the actuator must 12 then over a distance from the thermostatic element 7 be moved out, which is a multiple of the stroke of the face plate 15 equivalent. This multiple corresponds to the ratio of the cross section of the indentation 9 to the cross section of the face plate 15 ,
  • This should be exemplified by the 2 be explained. It is assumed that the volume of the pressure chamber 8th in the adjustment of the face plate 15 is constant. This requirement is only made to simplify the explanation. It is not required to the setpoint of the thermostatic valve top 1 to adjust.
  • If you have the face plate 15 moved by a small stroke a, this has the consequence that in the indentation 9 a corresponding volume must be displaced. But this is a movement of the actuator 12 required by a distance b. Depending on the ratio between the extension of the face plate 15 and the cross section of the invagination 9 This can be a translation by the factor 3 or more, especially 5 or more. This applies in the undisturbed case, ie as long as that Valve is not closed yet and the actuator 12 can still move.
  • In conventional thermostatic valve elements one expects a change in position of the actuating element 12 of 0.2 mm / ° C. With a setpoint change in the range of 20 ° C, for example from 10 ° to 30 ° C, a movement of 4 mm would accordingly be required. So if you set the target value, as was previously the case, by a displacement of the thermostatic element 7 changed, then you would have the thermostatic element 7 to shift these 4 mm. The fact that now only the shape of the thermostatic element 7 changed, so the face plate 15 shifted, only a stroke of 0.8 mm is required here.
  • One can therefore calculate which lifting height a of the front plate 15 is required to a desired change in the starting position of the actuating element 12 to effect and then in function of the maximum permissible angle of rotation of the rotary handle 5 the slope of the thread 25 choose.
  • The housing 4 has a capsule 22 on, in which the thermostatic element 7 is arranged. The twist grip 5 points in its front 23 an extension 24 on, in a tapped hole 25 the capsule 22 intervenes. The threaded connection between the extension 24 and the capsule 22 has a very small pitch of, for example, 3 mm / rev or less, more preferably 1 mm / rev or less. The extension 24 lies on the front plate 15 of the thermostatic element 7 on, with the face plate 15 has a certain rigidity.
  • The bottom plate 14 of the thermostatic element 7 is by a pressure spring 26 that are on the case 4 supports, in the direction of the face plate 15 pressed. In this case, however, the capsule has a projection 27 on, at which the lower end 19 the peripheral wall or a radial projection of the bottom plate 14 abuts so that the bottom plate 14 while down on the radiator valve 2 To move, the movement of the radiator valve 2 away but limited.
  • By a rotation of the rotary handle 5 opposite the housing 4 and thus against the capsule 22 becomes the extension 24 further into the capsule 22 moved in or further out of her. This movement of the extension 24 leads to compression or expansion of the thermostatic element 7 and thus to a change in the shape of the pressure chamber 8th , which - at a constant volume - in a movement of the actuator 12 manifests.
  • If during a change in shape of the pressure chamber 8th at the same time the temperature in the pressure chamber 8th Of course, this is also possible. Then the adjustment of the setpoint is superimposed on a change in the controlled variable.
  • In the illustrated embodiment, the shape advantage of the thermostatic element has the following advantage: If one imagines a situation in which the radiator valve is completely closed, the actuator 12 So as far as possible from the thermostatic element 7 has been pushed out, but the room temperature continues to rise, then there is a risk of damage to the thermostatic element 7 because of the pressure in the pressure chamber 8th increases. In the present case, the increase in pressure in the pressure chamber 8th but easily possible, because at such a pressure increase the bottom plate 14 against the force of the overpressure spring 26 can shift and thus an increase in volume of the pressure chamber 8th causes, by the a critical increase in pressure in the pressure chamber 8th can be prevented. It is particularly advantageous that the desired increase in volume already at a relatively small displacement movement of the bottom plate 14 results.
  • Because the displacement movement of the bottom plate 14 is relatively small in the setpoint adjustment as well as in the overpressure protection, it is sufficient if the corrugation 17 the peripheral wall 16 a smaller number of waves 18 has as the corrugation on the inner wall 10 ,
  • Another advantage is that you at a thermostatic element 7 with a flexible large bellows-shaped peripheral wall 16 the choice is, the pressure room 8th more or less to fill, compared to a conventional thermostatic element, and thereby the gain of the thermostatic element 7 to change. The gain is the ratio of the movement of the actuator 12 to the temperature change.

Claims (7)

  1. Thermostatic valve attachment with a thermostatic element, which has a pressure chamber in which internal volume-changing means are arranged, and with an actuating element, which is in operative connection with a Dehnzone of the thermostatic element, wherein outer shape-changing means are provided, the externally the shape of the pressure chamber outside the Dehnzone characterized in that the shape-changing means is an extension ( 24 ) of an actuating handle ( 5 ) which is in a capsule ( 22 ), in which the thermostatic element ( 7 ) is arranged.
  2. Attachment according to claim 1, characterized in that the thermostatic element ( 7 ) an external re peripheral wall ( 16 ), which is formed variable in length.
  3. An attachment according to claim 2, characterized in that the outer peripheral wall ( 16 ) a corrugation ( 17 ) having.
  4. An attachment according to claim 3, characterized in that the corrugation ( 17 ) on the outer peripheral wall ( 16 ) a smaller number of waves ( 18 ) as a corrugation ( 11 ) in an expansion zone formed by an indentation, into which the actuating element ( 12 ) is used.
  5. Attachment according to one of claims 1 to 4, characterized in that the extension ( 24 ) a screw thread ( 25 ), by means of which by twisting two parts ( 5 . 22 ) one for the thermostatic element ( 7 ) available space is changeable.
  6. Attachment according to claim 5, characterized in that the thermostatic element ( 7 ) an anti-twist device ( 21 ) having.
  7. Attachment according to one of claims 1 to 6, characterized in that the thermostatic element ( 7 ) by a pressure spring ( 26 ) is supported.
DE2001162608 2001-12-20 2001-12-20 Thermostatic valve top Expired - Fee Related DE10162608B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001162608 DE10162608B4 (en) 2001-12-20 2001-12-20 Thermostatic valve top

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2001162608 DE10162608B4 (en) 2001-12-20 2001-12-20 Thermostatic valve top
GB0412658A GB2398621B (en) 2001-12-20 2002-12-13 Thermostat valve top part
PCT/DK2002/000848 WO2003054650A1 (en) 2001-12-20 2002-12-13 Thermostat valve cap
CNB028257081A CN100501627C (en) 2001-12-20 2002-12-13 Thermostat valve cap
AU2002366848A AU2002366848A1 (en) 2001-12-20 2002-12-13 Thermostat valve cap

Publications (2)

Publication Number Publication Date
DE10162608A1 DE10162608A1 (en) 2003-07-17
DE10162608B4 true DE10162608B4 (en) 2005-09-01

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ID=7709933

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001162608 Expired - Fee Related DE10162608B4 (en) 2001-12-20 2001-12-20 Thermostatic valve top

Country Status (5)

Country Link
CN (1) CN100501627C (en)
AU (1) AU2002366848A1 (en)
DE (1) DE10162608B4 (en)
GB (1) GB2398621B (en)
WO (1) WO2003054650A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501211B1 (en) * 2005-01-14 2007-10-15 Danfoss As Thermostatic terminal for a heating or refrigerating valve
AT501212B1 (en) * 2005-01-14 2007-10-15 Danfoss As Thermostatic terminal for a heating or refrigerating valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102865404A (en) * 2012-09-26 2013-01-09 无锡市诚信洗选设备有限公司 Flow valve knob of radiator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946555U (en) * 1966-07-13 1966-09-22 F W Oventrop Arn Sohn K G THERMOSTATICALLY CONTROLLED PIPELINE SWITCH.
DE29805921U1 (en) * 1997-05-27 1998-06-25 Kemper Gebr Gmbh & Co Kg Control valve for hot water circulation systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2342157A (en) * 1941-10-04 1944-02-22 Michael E Miller Thermostatic radiator valve
DK93427C (en) * 1953-12-16 1962-05-14 Danfoss Ved Ingenioer Mads Cla Thermostat-controlled radiator valve.
DE2521161A1 (en) * 1975-05-13 1976-11-25 Heimeier Gmbh Metall Theodor Thermostatic radiator valve with remote temperature head - has manual temperature adjustment on remote head instead of valve
JPS6212237B2 (en) * 1977-03-17 1987-03-17 Mitsubishi Chem Ind
US4216902A (en) * 1978-03-23 1980-08-12 Braukmann Armaturen Ag Thermostatic control valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946555U (en) * 1966-07-13 1966-09-22 F W Oventrop Arn Sohn K G THERMOSTATICALLY CONTROLLED PIPELINE SWITCH.
DE29805921U1 (en) * 1997-05-27 1998-06-25 Kemper Gebr Gmbh & Co Kg Control valve for hot water circulation systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501211B1 (en) * 2005-01-14 2007-10-15 Danfoss As Thermostatic terminal for a heating or refrigerating valve
AT501212B1 (en) * 2005-01-14 2007-10-15 Danfoss As Thermostatic terminal for a heating or refrigerating valve

Also Published As

Publication number Publication date
GB0412658D0 (en) 2004-07-07
GB2398621B (en) 2005-11-09
DE10162608A1 (en) 2003-07-17
AU2002366848A1 (en) 2003-07-09
WO2003054650A1 (en) 2003-07-03
GB2398621A (en) 2004-08-25
CN100501627C (en) 2009-06-17
CN1606722A (en) 2005-04-13

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Representative=s name: PATENTANWäLTE KNOBLAUCH UND KNOBLAUCH, 60322 FRANK

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